<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
        // function  cc(o){ o.siteUrl = 'http://www.ss.com'}
        // cc(webSite)
        //打印出 console.log(webSite.siteUrl)  


        function cc (o) {
            o.siteUrl = 'http://www.ss.com'
            // o=new Object()
            // o.siteUrl = 'http'
          
        }
        ///new Object()
        let webSite = {}
        cc(webSite)
        console.log(webSite.siteUrl)
    </script>
</body>
</html>